De momento ni Dolby Vision ni Dolby Atmos en Fire Stick.

https://www.forbes.com/sites/johnarc.../#a97a0636219d

However, while the app supports 4K and HDR10, it will not currently support Dolby Vision HDR or Dolby Atmos sound, even on Fire TV devices such as the Fire Stick 4K that can support both Dolby Vision and Dolby Atmos from other apps. Amazon tells me that it’s “working with Apple to add additional support for this type of content in the future.”